The baby was smart and immediately rejoiced: "If there are many people, you can order a few more dishes, and if you are alone, you can call a wonton and then a pastry." The only way to avoid wasting food is www.biquge.info to invite friends to eat more than one meal at a time, but in the end they have to pay for all the meals. But because of the emptiness of the purse, I can't do it often. Now that there is a way, you can eat a few things at a time, and you can only spend the same price as you can only call two or three things for yourself, which is of course the best. In this way, diners are willing to come more often. Our voices are even better. Sister Zhen'er, what a great idea!"

She smiled faintly, not too happy with the baby's appreciation. This simple AA system is popular in modern times, but the ancients didn't expect it, and she is not good at taking credit.

She continued: "But that makes it easier for diners, and we can have trouble counting the money for diners. If the diners are coming in the plural, it shouldn't be a big problem. But if the diners come with a negative number, five is easy to count, and three is a big problem. In the simplest example, ten divided by three, the result is never to be divided. We can use the method of rounding up to find out how much each of the three people will pay, and then we can't ask the diners to pay more, so we might as well round off the decimal number to give the diners a discount. In this way, the diners are also happy, and our loss is no more than one or two cents, which can be ignored. Of course, if we meet a considerate diner who is not greedy for cheap, we can do the same. If you can't get rid of it, it will be counted as asking the person who came to eat to pay more than that. In this way, the person only needs to pay an extra penny and feels that he has face, and we will not lose a cent. ”

The baby was even happier when he heard this, and he couldn't wait to propose it to his father. She waved her hand, and the baby went.

Leaving Mr. Wu, digested it for a while, did not pursue academics, only looked at practical application, and really felt that her method was good, the best!

The baby is not there, and what should be learned and what should be seen has also been seen. Mr. Wu's childlike appearance was closed, he stroked his beard, the old pedant nodded again and again, and smiled at her appreciatively: "Zhen'er girl, I don't know if you have studied this arithmetic by yourself, or who has you learned it from?"

She said without changing her face: "I studied it myself." ”

Mr. Wu was stunned for a moment, smiled more happily, and did not question it, but asked: "Then I don't know, if I want to teach this knowledge to more students, do you mind?"

"Don't mind. She replied without thinking.

"Good!good!" Mr. Wu nodded again and again. The wrinkled eyes looked at her kindly. She felt that Mr. Wu liked her very much, not only for her knowledge, but also for her generous character.

After thinking about it, she planned to spare no effort to teach them some more, and said, "Actually, this algorithm can be used better, there is a little trick." She sold off and didn't go on.

Wa'er and Mr. Wu really asked in unison, "What tricks? ”

But she said, "If you want me to teach you, you can." But you have to assure me that you can only use this trick yourself, and no one else will know about it. ”

The baby didn't care so much, but nodded desperately. Mr. Wu hesitated. She said that she couldn't be known by outsiders, that is, she asked Mr. Wu not to transfer to others. But Mr. Wu didn't hesitate for too long, so he nodded solemnly and promised: "Okay, I swear to God that I will never be known by others." ”

She picked up a pen and paper again, and wrote two lines on the paper: one, two, three, four, five...... Zero corresponds to 12345 ...... 0, and then said: "The strokes of Chinese characters are complex, and it takes some time to write, but if you replace the numbers with these symbols when calculating, it will be much easier." ”

Wa'er and Mr. Wu had never seen anyone write numbers like this, and they were both surprised, but the reader's skills in learning calligraphy were first-class, and they quickly memorized this way of writing. The two of them practiced a few times to write the numbers correctly, and then calculated two examples at random, and sure enough, this writing saved some time and was able to get the results faster.

Mr. Wu sighed: "Wonderful!" But after Mr. Wu sighed, he looked at her very deeply and said: "Writing Chinese characters in this way really saves a lot of strokes and is much easier." However, the word is the foundation of the country, and it should not be changed and simplified without permission. I have memorized this and will not teach it to my students. ”

She nodded, in response to Mr. Wu's concern. Although she just didn't want to let the numbers that belonged to the West spread too early in the antiquity of this life before the East and the West came into contact. Anyway, Mr. Wu and Wa'er have already promised her, and she doesn't need to explain Mr. Wu's misunderstanding.

She looked at the sky and thought that she would have to go elsewhere, so she got up and said goodbye, "I've seen Mr. Wu." Zhen'er wanted to go elsewhere, so she went first. I'll come back another day to ask for advice. ”

Mr. Wu stroked his beard and smiled: "Waiting for you at any time." ”

She touched the top of the baby's head again. The little boy no longer minded being touched by her after her day's seclusion, but because he had learned more, he was happy and a little reluctant: "Sister Zhen'er, goodbye, you have to come and see me again and teach me more." ”

"Good. I'll come back to see you. But she didn't promise to teach her baby more, because she felt that it was enough.

I wanted to come down alone, but Wa'er and Mr. Wu came with me.

With the help of pears and plums, Sister-in-law Lu was able to sort out what she had gained today at the counter. If I don't see Brother Lu, he should be busy in the back kitchen. Seeing the three of them coming down, Sister-in-law Lu hurriedly put down the money in hand and greeted her from behind the counter.

"Sister-in-law Lu, let's go first. Go back and help me talk to Brother Lu. I don't have to keep the upstairs box for me all the time, and when it's full, I can also sit for other guests. Next time I come, I can go to the baby's room and sit down and talk to him, just wait. As she spoke, she took out a piece of broken silver and put it in the bamboo basket on the counter.

Sister-in-law Lu naturally hurriedly refused, and even said: "You take this silver, Miss, you have promised it a long time ago, and you don't need to give it again in the future." If you do this, will we return the capital to you in the future?"

"No, no. She waved her hand again and again, but she couldn't resist Sister-in-law Lu, so she had to take the two pieces of silver back, and said with a smile: "That money is not much." I don't have to pay any more money in the future, that's a big bargain for me. Aren't you afraid that every time we come, we will eat such a big table and eat you yellow?"

Sister-in-law Lu smiled: "Then I want you to come often." We're not afraid, but remember to come often. ”

She smiled, but didn't answer. It's not that she doesn't want to, she's just afraid, but after she arrives, she doesn't want to come out for a walk, so she can come out at will. But seeing that Sister-in-law Lu was enthusiastic, the baby behind her and Mr. Wu were also looking forward to it. In the end, she still replied with a smile: "I will definitely come back." ”